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Van der Waals interactions and the limits of isolated atom models at interfaces
Van der Waals forces are among the weakest, yet most decisive interactions governing condensation and aggregation processes and the phase behaviour of atomic and molecular matter. Understanding the resulting structural motifs and patterns has become increasingly important in studies of the nanoscale...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4869171/ https://www.ncbi.nlm.nih.gov/pubmed/27174162 http://dx.doi.org/10.1038/ncomms11559 |
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author | Kawai, Shigeki Foster, Adam S. Björkman, Torbjörn Nowakowska, Sylwia Björk, Jonas Canova, Filippo Federici Gade, Lutz H. Jung, Thomas A. Meyer, Ernst |
author_facet | Kawai, Shigeki Foster, Adam S. Björkman, Torbjörn Nowakowska, Sylwia Björk, Jonas Canova, Filippo Federici Gade, Lutz H. Jung, Thomas A. Meyer, Ernst |
author_sort | Kawai, Shigeki |
collection | PubMed |
description | Van der Waals forces are among the weakest, yet most decisive interactions governing condensation and aggregation processes and the phase behaviour of atomic and molecular matter. Understanding the resulting structural motifs and patterns has become increasingly important in studies of the nanoscale regime. Here we measure the paradigmatic van der Waals interactions represented by the noble gas atom pairs Ar–Xe, Kr–Xe and Xe–Xe with a Xe-functionalized tip of an atomic force microscope at low temperature. Individual rare gas atoms were fixed at node sites of a surface-confined two-dimensional metal–organic framework. We found that the magnitude of the measured force increased with the atomic radius, yet detailed simulation by density functional theory revealed that the adsorption induced charge redistribution strengthened the van der Waals forces by a factor of up to two, thus demonstrating the limits of a purely atomic description of the interaction in these representative systems. |
format | Online Article Text |
id | pubmed-4869171 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48691712016-05-26 Van der Waals interactions and the limits of isolated atom models at interfaces Kawai, Shigeki Foster, Adam S. Björkman, Torbjörn Nowakowska, Sylwia Björk, Jonas Canova, Filippo Federici Gade, Lutz H. Jung, Thomas A. Meyer, Ernst Nat Commun Article Van der Waals forces are among the weakest, yet most decisive interactions governing condensation and aggregation processes and the phase behaviour of atomic and molecular matter. Understanding the resulting structural motifs and patterns has become increasingly important in studies of the nanoscale regime. Here we measure the paradigmatic van der Waals interactions represented by the noble gas atom pairs Ar–Xe, Kr–Xe and Xe–Xe with a Xe-functionalized tip of an atomic force microscope at low temperature. Individual rare gas atoms were fixed at node sites of a surface-confined two-dimensional metal–organic framework. We found that the magnitude of the measured force increased with the atomic radius, yet detailed simulation by density functional theory revealed that the adsorption induced charge redistribution strengthened the van der Waals forces by a factor of up to two, thus demonstrating the limits of a purely atomic description of the interaction in these representative systems. Nature Publishing Group 2016-05-13 /pmc/articles/PMC4869171/ /pubmed/27174162 http://dx.doi.org/10.1038/ncomms11559 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Kawai, Shigeki Foster, Adam S. Björkman, Torbjörn Nowakowska, Sylwia Björk, Jonas Canova, Filippo Federici Gade, Lutz H. Jung, Thomas A. Meyer, Ernst Van der Waals interactions and the limits of isolated atom models at interfaces |
title | Van der Waals interactions and the limits of isolated atom models at interfaces |
title_full | Van der Waals interactions and the limits of isolated atom models at interfaces |
title_fullStr | Van der Waals interactions and the limits of isolated atom models at interfaces |
title_full_unstemmed | Van der Waals interactions and the limits of isolated atom models at interfaces |
title_short | Van der Waals interactions and the limits of isolated atom models at interfaces |
title_sort | van der waals interactions and the limits of isolated atom models at interfaces |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4869171/ https://www.ncbi.nlm.nih.gov/pubmed/27174162 http://dx.doi.org/10.1038/ncomms11559 |
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